Making brushes.



I. MORRISON.

MAKING BRUSHES.

APPLICATION FILED APR. I3, 1916.

1,265,808. IIIQIIIQII May14,1918.

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J. MORRISON.

MAKING BRUSHES.

- APPLICATION FILED APR- 3| 1916. 1,265,808. Patented Maylf, 1918.

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MAKING BRUSHES.

Specification of Letters Patent.

'Patenten nay it, rais.

Application filed April 13, 1916. Serial No.' 90,966.

To all whom t may concern:

Be it known that I, JOHN MORRISON, a citizen of the United States, residing at Leominster, county of Worcester, and State of Massachusetts, have invented certain new and useful Improvements in Making Brushes, of which the following is a specification.

Reference maybe had to the accompanying drawings, and the reference characters -marked thereon, which form a part of this specification. Similar characters refer to similar parts in the several figures therein.

This invention relates to the manufacture of brushes made of a bristle-supporting pad or body of composition mounted within a cover or receptacle of thin sheet-material such as celluloid or the like.

The principal obj ect of the invention is to obtain a more intimate contact between the bristle pad or body and the receptacle or covering of sheet-material, whereby they form a substantially solid structure.

Figure 1 of the drawings is a view in vertical cross-section of a brush made in accordance with my invention.

Fig. 2 is a view in vertical cross-section of the apertured bristle-supporting die-plate used in making brushes by my improved method, the plate being filled with bristles.

Fig. 3 is a 'similar view of the upper dieplate, up-side-down, and containing a receptacle of thin sheet-material and therewith in a mass of hot plastic composition preparatory to inverting the same upon the dieplate containing the bristles.

Fig. 4 is a vertical cross-section showing the upper die-plate and contents inverted upon the bristle-supporting die-plate, but before the die-plates have been pressed together.

Fig. 5 is a similar view showing the dieplates pressed together and the brush formed between them.'

Fig. 6 is a vertical cross-section of the receptacle of sheet-material which forms the outer surface of the brush-back.

Fig. 7 is a similar view of a receptacle having its edge partly inturned preliminary to the molding operation.

Referring to the drawings wherein the invention is shown in preferred form, 1 is the lower die-plate of a brush-mold having on its upper side a molding surface, 2, with numerous perforations, 3, formed therethrough adapted to receive small knots or bunches of bristles, et, the ends of which bristles project above said molding-surface.

The upper die-plate, 5, has its cavit of the form which isl to be imparted to the ished brush.

In carrying outmy invention, l employ a receptacle, 5, of thin sheet-material, such as celluloid, which is adapted to cover and form a finished surface for the brush-back, except that portion thereof, from which the bristles project.

The upper die-plate, 6, is inverted, the receptacle, 5, is placed therewithin, and a quantity of hot plastic material is deposited within said receptacle.

The said upper die-plate, receptacle, and hot composition are next inverted upon the bristle-supporting die-plate in the position shown in Fig. 4, and the die is then placed in a press and the die-plates forced together causing the hot/composition to be pressed into intimate contact with,YV and to fill, the receptacle, and to be forced between and around the bristle-ends and given afinished. surface by the molding-surface, 2.

The die is left in the press until the composition has cooled and hardened, after which the die-plates are separated and the finished brush is removed.

The sheet-Celluloid becomes softened and plastic under the inuence of the heat from the composition so that it readily conforms to the inner surface of the die and retain said form when cold.

The bristle-supporting die-plateis preferably formed with a groove, 7, extending around the space into which the bristles project and the sides of the receptacle, 5, are made of suilicient depth so that upon engagement with said groove, 7, they are inturned upon the bristle-supporting face of the composition pad, as shown in Figs. l

and 5.

If desired, the edges of the receptacle may be inturned before the receptacle is placed in the die, such form being shown in Fig. 7 in which case, however, the nal form will be given to the inturned edge by the die under the influence of the heat from the composition.

The receptacle or cover ma be made of any desired thin sheet-material which becomes'plastic when heated,l Celluloid being well adapted for the purpose.

rbiusiies may be employed? which Textile ebie impfegpete with sbeiiee may eiso be employed9 es Weil es "pa-pei eoeft ed with eeiiiiioi in the finished prouot the feeepteoie oi cover' is in moicied intimate Contact with the composition p36., oiming tbeewitb. e substentieily solid stsrtieture7 the composition/i pecl suppoitiog in xterm the sheet-materiel and the letter reinfoioiiig the compositioia and adding strength tbeieto Ally of tile usuel compositions foi eeome piestio when heated.

A mixtape oi gum end pigment is seA .oi

for trie puipose What daim as new end fiesiife to seotie by Letters Patent is:

2L. That impiovemeiit iii tbe oi bLf-ushes which Consists 'iii' simulteneousiy molding iito :toim and intimate cont-eet uilder the niuenoe of heet iom the composition itseii, e biistle-suppoting body of oomposition While bot met 'ecepteole oovei tbeiefor of thin sheet-meteiiei, seid s`v eet material and eompositioii beingl piestio when heated.,

2. 'filet impiovement in tbe et of making brushes which consists in intuiping undef the influence of beet from tbe composition etige-portions of e pecepteoie of tbin sheetmztteiiei ove? tbe edges of e bi'istie-euppoyto reoepteoie, seid composition emi sheet-materiel being piastio when bee-ted.

That impiovement iii the art of making brushes, which consists iii supporting bristles in. an epertured die-plete with ends projecting beyond e molding-suiace on tbe plate, appiyii g; to said ends oi the bristles a, het mess of plastic composition covered by e ieeepteeie of thin sbeetmeteiai piestic un.-

f; influence oi beet, and compressing beeted composition and. said receptacle into and iiitimete Contact between said die meeebez and a oopeietive die-member. Li. Toet iiiipiovemeiit in the eit of mahog biusiies which Consists iii supporting bristies in an epetuie die-plete with ends piojectiilgbeyond a redding-surface on tbe piete,

applying to seid ends oi the bristes e het o plastic oomposition covered by e, ieee pteoie of Sbeetmeteiiai piestig undei? tbe inuence of beet, and compressing seid beeted Composition and said receptacle into o'm' and intuiiiinp' the edge of the feeepteoie upon the moime fece of the com- 'tf between seid die-plete and e eoope ite-piatte.

in testimony Wbeeo, l have hereunto set my heed this lst dei; o' Apifii, 1916.

" N MURRSGN. 

